package com.atguigu.srb.core.service.impl;

import com.alibaba.excel.EasyExcel;
import com.atguigu.srb.core.linstener.ExcelDictDTOListener;
import com.atguigu.srb.core.pojo.dto.ExcelDictDTO;
import com.atguigu.srb.core.pojo.entity.Dict;
import com.atguigu.srb.core.mapper.DictMapper;
import com.atguigu.srb.core.service.DictService;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.exception.ExceptionUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;

/**
 * <p>
 * 数据字典 服务实现类
 * </p>
 *
 * @author oldCookies
 * @since 2021-09-12
 */
@Service
@Slf4j
public class DictServiceImpl extends ServiceImpl<DictMapper, Dict> implements DictService {

    @Resource
    RedisTemplate redisTemplate;
    @Transactional(rollbackFor = Exception.class)
    @Override
    public void importData(InputStream inputStream) {
        EasyExcel.read(inputStream, ExcelDictDTO.class,new ExcelDictDTOListener(baseMapper)).sheet().doRead();
        log.info("导入成功");
    }

    @Override
    public List<ExcelDictDTO> ListDictdata() {
        List<Dict> dicts = baseMapper.selectList(null);
        List<ExcelDictDTO> excelDictDTOS=new ArrayList<>(dicts.size());
        dicts.forEach(dict->{
            ExcelDictDTO excelDictDTO = new ExcelDictDTO();
            BeanUtils.copyProperties(dict,excelDictDTO);
            excelDictDTOS.add(excelDictDTO);
        });
        return excelDictDTOS;
    }

    @Override
    public List<Dict> listByParentId(Long parentId) {
        List<Dict> dictList=null;
        try {
            dictList= (List<Dict>) redisTemplate.opsForValue().get("srb:core:dictList" + parentId);
            if (dictList!=null){
                log.info("从redis中取值");
                return dictList;
            }
        } catch (Exception e) {
            log.error("redis服务器异常：" + ExceptionUtils.getStackTrace(e));//此处不抛出异常，继续执行后面的代码
        }

        log.info("从数据库中取值");
        QueryWrapper<Dict> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("parent_id",parentId);
        dictList = baseMapper.selectList(queryWrapper);
        dictList.forEach(dict -> {
            //判断当前节点是否有子节点
            boolean hasChildren = hasChildren(dict.getId());
            dict.setHasChildren(hasChildren);
        });

        try {
            redisTemplate.opsForValue().set("srb:core:dictList" + parentId,dictList,60, TimeUnit.MINUTES);
            log.info("数据存入redis");
        } catch (Exception e) {
            log.error("redis服务器异常：" + ExceptionUtils.getStackTrace(e));//此处不抛出异常，继续执行后面的代码
        }
        return dictList;
    }

    @Override
    public List<Dict> findByDictCode(String dictCode) {
        QueryWrapper<Dict> dictQueryWrapper = new QueryWrapper<>();
        dictQueryWrapper.eq("dict_code", dictCode);
        Dict dict = baseMapper.selectOne(dictQueryWrapper);
        return this.listByParentId(dict.getId());
    }

    @Override
    public String getNameByParentDictCodeAndValue(String dictCode, Integer value) {
        QueryWrapper<Dict> dictQueryWrapper = new QueryWrapper<Dict>();
        dictQueryWrapper.eq("dict_code", dictCode);
        Dict parentDict = baseMapper.selectOne(dictQueryWrapper);

        if(parentDict == null) {
            return "";
        }

        dictQueryWrapper = new QueryWrapper<>();
        dictQueryWrapper
                .eq("parent_id", parentDict.getId())
                .eq("value", value);
        Dict dict = baseMapper.selectOne(dictQueryWrapper);

        if(dict == null) {
            return "";
        }

        return dict.getName();

    }

    private boolean hasChildren(Long id){
        QueryWrapper<Dict> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("parent_id",id);
        Integer integer = baseMapper.selectCount(queryWrapper);
        if (integer.intValue()>0){
            return true;
        }else {
            return false;
        }
    }

}
